.weui-btn
    display block;
    width 184px;
    margin-left auto
    margin-right auto
    padding 8px 24px
    font-weight 700
    font-size 17px
    text-align center
    text-decoration none
    color #fff
    line-height 1.8824
    border-radius 8px
    // background-color #07c160
    // &:active   //&引用上一级类名 
    //     background-color #11a160
    &_primary
        background-color #07c160
    &_loading
        background-color pink 
    &_disabled
        color rgba(255, 255, 255, 0.2)
        background-color rgba(0, 0, 0,0.8)